The problem of low ammonia excretion
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When the Linde Process low-A system reaches a certain level, the ammonia content will exceed the standard. How should the ammonia be discharged during this period? Where does ammonia come from? Where is ammonia mainly concentrated?
Part of the process gas can be discharged from the E14 bypass to the acid gas to maintain the ammonia content of the system. When ammonia is driven by V After the liquid phase of 1 enters the high-temperature C5 tower and the circulating methanol enters the C4 in the high-temperature zone from the C3 tower still in the low-temperature zone, the ionic substances ammonia sulfide and ammonium carbonate are partially converted into molecular forms of NH3, CO2, and H2S, and enter the gaseous state from the top of the C5 tower. It enters the C4 tower. After the top of the C4 tower is cooled by the water cooler, the gas and liquid are separated. A part of the ammonia returns to the C4 tower with the reflux liquid. After the gas phase is cooled by the sour gas ammonia cooler, a small amount of ammonia is discharged from the system with the acid gas. Most of the ammonia is condensed and returned to the bottom of the C3 tower. Most of the NH3 entering the C5 tower is discharged from the C5 tower still in the form of ammonium ions.
It is mainly discharged from the wastewater at the bottom of the methanol-water separation tower~!
The ammonia content in circulating methanol can be controlled by adjusting the amount of shift gas scrubbing water in the carbon monoxide process and venting the hydrogen sulfide heat exchanger bypass (pressure relief bypass of the regeneration tower) in the low-temperature methanol scrubbing system. If necessary, the operating temperature of the ammonia cooler at the top of the hot regeneration tower can be appropriately increased so that most of the ammonia is discharged from the system with hydrogen sulfide gas. This post was last edited by yqzls1 on 2009-4-19 14:57 ]
I think it should be discharged from the bottom of the distillation tank at the top of column 4.
Discharge from the sulfur return pump outlet of the thermal regeneration tower. The acid gas coming out of the thermal regeneration tower has the highest ammonia content.
Ammonia discharge is mainly discharged from the top of the regeneration tower, together with acid gas, or methanol is discharged from the top of the regeneration tower.